Introduction
Inverted papilloma is benign epidermal neoplasm of not recognized etiology. The lesion is estimated to represent 0.5–4% of sinonasal tumors. Generally inverted papilloma is unilateral, arises from the lateral nasal wall and characterizes with local destruction and rapid growth. The tumor can possibly undergo malignant transformation. The treatment of choice is surgery, recently endoscopic approach is considered to be superior to the open approach.